نتایج جستجو برای: caspian littoral
تعداد نتایج: 6339 فیلتر نتایج به سال:
We quantified the distribution, abundance and assemblage structure of macrofauna at 22 stations in Gorgan bay, seasonally in 2012-2013. Also, depth, temperature, salinity, DO, TOM and sediment particle size were measured in each station. The highest concentration of TOM was measured near the western littoral zone (10.22) while the mouth part and north-eastern area was characterized by the lowes...
Improve the understanding of cloud and boundary layer processes within the littoral through the use of the Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS) and relevant observations. Improve the moist and boundary layer physics schemes used in COAMPS based on knowledge gained through extensive testing and verification of high-resolution (1-20 km horizontal grid spacing) numerical s...
Significant concentrations of oxalate (dissolved plus particulate) were present in sediments taken from a diversity of aquatic environments, ranging from 0.1 to 0.7 mmol/liter of sediment. These included pelagic and littoral sediments from two freshwater lakes (Searsville Lake, Calif., and Lake Tahoe, Calif.), a hypersaline, meromictic, alkaline lake (Big Soda Lake, Nev.), and a South San Franc...
During the austral spring and summer months, the Antarctic limpet Nacella concinna colonizes intertidal environments in the Western Antarctica Peninsula region. The species is divided into a permanently sub-littoral and a seasonally intertidal, migratory subpopulation. We investigate the physiological differentiation between the two limpet groups to identify cellular and molecular changes that ...
INTRODUCTION The sturgeons of the Caspian Sea are considered highly valuable species. The Caspian Sea has traditionally been regarded as the sea of sturgeon since it produces more than 90 percent of the world’s caviar. Despite a remarkable decline of sturgeon numbers over recent years, the Caspian Sea still continues to be of considerable importance in sturgeon fisheries. In 1997, the global la...
* The author is employed at the United Nations Environment Programme’s Regional Office for Europe. The paper is presented by the author in her personal capacity, however, and opinions expressed in this paper should be attributed to the author. They are not meant to represent the positions or opinions of UNEP or the State Parties to the Framework Convention on the Protection of the Marine Enviro...
Diversity and community structure of aerobic methane-oxidizing bacteria in the littoral sediment of Lake Constance was investigated by cloning analysis and terminal restriction fragment length polymorphism (T-RFLP) fingerprinting of the pmoA gene. Phylogenetic analysis revealed a high diversity of type I and type II methanotrophs in the oxygenated uppermost centimeter of the sediment. T-RFLP pr...
The long-term goal of this project is to derive a general and comprehensive algorithm to calculate a scalar image metric which will help quantify the performance of emerging laser-based imaging systems in the highly variable optical littoral environment. After validation, this image metric will then be used to assist in mission planning by providing up-to-date maps of the expected system perfor...
Iran’s security is affected by a broad region that includes the Caspian Basin, Central Asia, Afghanistan, the Persian Gulf states, Pakistan, Turkey, and the Middle East. However, an increased focus on the countries of the Economic Cooperation Organization (ECO), as well as Iraq, on the one hand, and with members of the Gulf Cooperation Council (GCC) (including Yemen) on the other, provides a na...
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